Automated troubleshooting for RTWP in 3G/4G RAN nodes

Mohammed, Hisham

Automated troubleshooting for RTWP in 3G/4G RAN nodes

Master Thesis

2018

Abstract

Nowadays, Mobile Network Operators are confronted with many challenges to operate and maintain their network. Subscribers expect stable and perpetual services. Repeated interruptions of services will result in the dissatisfaction of users and may lead to losing the end user. One of the major issues facing a Radio Access Network (RAN) mobile operator is coping with the uplink interference in their RAN, such as the Receive Total Wideband Power (RTWP) in the Universal Mobile Telecommunications System (UMTS) band. A frequently occurring issue in such networks is the RTWP alarm. This alarm is reported in the Network Operation Centre (NOC) and contribute to poor quality in the network . Such an alarm may occur daily, thus impacting the network’s Key Point Indicator (KPI). The mobile network operator always tries to resolve the issue of RTWP quickly by means of several processes and strategies to diagnose and troubleshoot this issue, all within a target ‘Service Level Agreement’ (SLA). There are many different causes that can lead to an RTWP alarm in a mobile 3G RAN. In addition, each of these cases has different diagnoses and troubleshooting methods. The main idea of this project is to design a Graphical User Interface (GUI) tool to help the Front Office (FO) or Back Office (BO) engineer in mobile network operator to check and troubleshoot the RTWP issue in the network in a timely manner. The tool is designed to check the configuration of the radio, based on the Huawei NodeB 3900 and statistical performance counters, and to provide the correct decision for the engineer to improve the efficiency and minimize the time taken to troubleshoot the RTWP alarm in the network. It is very useful to design such a tool for interacting with the Huawei NodeB 3900. The GUI tool is thus basically designed to support the engineers in Oman Telecommunication Company’s NOC while dealing with the RTWP alarm in the Huawei NodeB 3900. The major finding of this study is the design of the GUI tool to minimize the time taken to resolve the RTWP issue in the Huawei NodeB 3900 both in a single site and in multiple sites, to conduct consistency checks for the software parameters, and finally to identify the root cause of the RTWP alarm. The GUI tool shows an operation log, which can be used by the administrator for maintenance records, and it also contains a help guide that gives the user more information about the functionality of each button.

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